Ship reactor

A ship reactor is a ship part needed to take off. It has a 15-day activation time, during which the colony will be attacked by many raids. The raids will stop once the reactor is fully activated. It can't be built under a roof, but you can build a roof above it afterwards.

The reactor may be powered on despite the rest of the ship not being built yet. This currently can be exploited since building the whole ship first will increase your colony's wealth, increasing the strength of raids.

It can also be used to power a base like a normal generator, constantly providing 1000W regardless of conditions, though its cost and size makes it extremely inefficient for such even in the endgame.